JPH033811Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a spiral heat exchanger for handling fluids containing slurry, particularly fibrous slurry.

Conventional technology Spiral heat exchangers that handle fluids containing slurry have traditionally installed piecemeal spacers such as stud pins on the heat transfer surface to prevent fibrous slurry from getting caught in the slurry flow path. Not used. In this case, a flat bar or round bar was attached to the edge of the heat exchanger plate constituting the flow path for sealing purposes.

Problems that the invention aims to solve: When flat bars or round bars are attached to both ends of the flow path as described above, the flow path becomes blocked at these parts, causing slurry, etc. to adhere to the inside of the heat transfer surface. There were also disadvantages in that inspections could not be carried out, and mechanical repairs and cleaning could not be done adequately.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention aims to solve the above-mentioned problems. Stud pins provided at appropriate intervals along the edge of the heat exchanger plate at the edge of the flow path that does not touch the hot surface, a housing part containing these stud pins, and a housing part extending inward from this housing part. The cover body is made of rubber, synthetic rubber or other flexible band-shaped cover body having a slit part, and stud pins are inserted into the accommodation part from the end edge of the flow path which does not have the spacer through the slit part. The structure is such that it is pushed in and fixed to the edge of the spiral.

Function Among the flow channels of a spiral heat exchanger, stud pins are welded and fixed at appropriate intervals at the edges of the flow channels that do not have fragmentary spacers such as stud pins on the heat transfer surface. Therefore, the space between the heat exchanger plates forming the flow path can be maintained.

In addition, since there is a strip-shaped cover body that encloses these stud pins and is spirally attached to the end edge of the flow path, the slurry, especially the fibrous slurry, adheres to the inner wall of the strip-shaped cover body. Therefore, by simply removing the band-shaped cover body from the stud pin, it has become easy to clean the band-shaped cover body, as well as to clean the flow path and inspect the inside.

Since the band-shaped cover body is made of rubber or other flexible material and has a slit portion, the stud pin can be easily stored in the housing portion and the band-shaped cover body can be removed through the slit portion.

Embodiment Hereinafter, drawings as an embodiment will be described. FIG. 1 is a sectional view of the spiral heat exchanger of the present invention, and FIG. 2 is an enlarged sectional view of the main parts. Reference numeral 1 denotes a heat exchanger plate, which is spirally wound with or without intervening piecemeal spacers 2 such as stud pins to form a spiral heat exchanger. Reference numeral 3 denotes a channel for slurry that does not have fragmentary spacers such as stud pins on the heat transfer surface, and 4 indicates a channel having stud pins. Heat is exchanged between these channels via the heat exchanger plate 1. Reference numeral 5 denotes a stud pin, which is provided at the edge of the heat exchanger plate so as to maintain the distance between both ends of the flow path 3, which does not have a piecemeal spacer on the heat exchanger surface. Reference numeral 6 denotes a band-shaped cover body, which has an accommodating portion 7 for accommodating the stud pin 5 and a slit portion 8 extending inward from the accommodating portion 7. 9
is a sealing material, which is welded to seal both end edges of the channel 4 having stud pins. The band-like cover body 6 may be made of rubber, synthetic rubber, or any other flexible sealing material, and flexible synthetic resin may also be used, and there is no restriction on the material, but it has elasticity that can seal the mounting part. This is desirable. 10 indicates a continuous spacer.

In addition, when the width L of the heat exchanger plate is long, there is no piecemeal spacer 2, but a continuous spacer 10 is provided in the center in the width direction, and stud pins 5 are provided on both edges.
and a belt-shaped cover body 6. Further, when the width L of the heat exchanger plate is short, the stud pin 5 and the band-shaped cover body 6 of the present invention may be provided at one end edge, and the other end edge may be closed using a sealing material 9. As described above, the stud pin 5 and the band-shaped cover body 6 of the present invention may be used at both or one end edge of a flow path that does not have a piecemeal spacer 2 such as a stud pin on the heat transfer surface.

In a conventional spiral heat exchanger, one end of the flow path having a stud pin and the other end of the flow path without a piecemeal spacer such as a stud pin are closed with a sealing material, and the fluid to be heat exchanged is closed with a sealing material. However, in the case of the present invention, a removable band-shaped cover body is used at one or the other end edge of the channel without stud pins to provide a sealing effect. . Therefore, in order to avoid mixing of the fluids to be heat exchanged, the end edge on the side of the channel 4 having the stud pin was closed with a sealing material 9.

Effects of the invention In the present invention, by providing a band-like cover body, the area surrounding the stud pins welded to both end edges of the channel without fragmentary spacers such as stud pins is covered, so that slurry etc. is not attached directly to the stud pin, but to the band-shaped cover body. Therefore, since the band-shaped cover body has a slit, only the band-shaped cover body can be removed by using the slit, and internal inspection and mechanical repair can now be easily performed. Moreover, since the band-shaped cover body can be attached and removed using the slit portion, the band-shaped cover body itself can be cleaned and can be used with a new one.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a spiral heat exchanger incorporating the belt-shaped cover body of the present invention, FIG. 2 is an enlarged sectional view of the same essential part, and FIG. 3 is a partial perspective view of the belt-shaped cover body. 1...Heat exchange plate, 2...Fragmentary spacer, 3, 4...
Channel, 5... Stud pin, 6... Band-shaped cover body, 7
...accommodating section, 8...slit section.

Claims (1)

[Scope of utility model registration request] In a flow path consisting of a spiral heat exchanger plate in a spiral heat exchanger, at the edge of the flow path that does not have a piecemeal spacer such as a stud pin on the heat transfer surface. It consists of stud pins provided at appropriate intervals along the stud pins, a rubber, synthetic rubber or other flexible belt-shaped cover body having a housing part that encloses these stud pins and a slit part extending inward from the housing part, The spiral type heat exchanger is characterized in that the cover body is pushed into the housing part from the end edge of the flow path not having the spacer through the slit part so as to enclose the stud pin, and is fixed to the spiral end edge. exchanger.